--- In NEONIXIE-L@..., westdave <WESTDAVE@...> wrote:
the best way i have found to DRIVE the projection displays is a cd4028 decade counter decoder driver & 2x uln2003 transistors in 16 pin dip, it take's BCD code also a good trick is to drive the lamps at 12volts if thats what there design is? and use a 12vdc to 5 vdc voltage converter and run the logic on the 5 vdc and the lamps at 12vdc
Isn't there a 74xx series IC that is a BCD to 1-of-10 decoder with open collector outputs just for this sort of thing?
They can be multiplexed nicely too without side effects but you do have to put a diode in series with each lamp.
The lamp voltage varies, 5V, 12V, 28V, and likely others were available.
